/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
****************************************************************/
package org.apache.cayenne.access;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.cayenne.DataObject;
import org.apache.cayenne.Persistent;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.EntitySorter;
import org.apache.cayenne.map.ObjEntity;
import org.apache.cayenne.query.DeleteBatchQuery;
/**
* @since 1.2
* @author Andrus Adamchik
*/
class DataDomainDeleteBucket extends DataDomainSyncBucket {
DataDomainDeleteBucket(DataDomainFlushAction parent) {
super(parent);
}
void postprocess() {
if (!objectsByEntity.isEmpty()) {
Collection deletedIds = parent.getResultDeletedIds();
Iterator it = objectsByEntity.values().iterator();
while (it.hasNext()) {
Iterator objects = ((Collection) it.next()).iterator();
while (objects.hasNext()) {
Persistent object = (Persistent) objects.next();
deletedIds.add(object.getObjectId());
}
}
}
}
void appendQueriesInternal(Collection queries) {
DataNodeSyncQualifierDescriptor qualifierBuilder = new DataNodeSyncQualifierDescriptor();
EntitySorter sorter = parent.getDomain().getEntitySorter();
sorter.sortDbEntities(dbEntities, true);
for (Iterator i = dbEntities.iterator(); i.hasNext();) {
DbEntity dbEntity = (DbEntity) i.next();
List objEntitiesForDbEntity = (List) objEntitiesByDbEntity.get(dbEntity);
Map batches = new LinkedHashMap();
for (Iterator j = objEntitiesForDbEntity.iterator(); j.hasNext();) {
ObjEntity entity = (ObjEntity) j.next();
qualifierBuilder.reset(entity, dbEntity);
boolean isRootDbEntity = (entity.getDbEntity() == dbEntity);
// remove object set for dependent entity, so that it does not show up
// on post processing
List objects = (List) objectsByEntity.get(entity);
if (objects.isEmpty()) {
continue;
}
checkReadOnly(entity);
if (isRootDbEntity) {
sorter.sortObjectsForEntity(entity, objects, true);
}
for (Iterator k = objects.iterator(); k.hasNext();) {
DataObject o = (DataObject) k.next();
ObjectDiff diff = parent.objectDiff(o.getObjectId());
Map qualifierSnapshot = qualifierBuilder
.createQualifierSnapshot(diff);
// organize batches by the nulls in qualifier
Set nullQualifierNames = new HashSet();
Iterator it = qualifierSnapshot.entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
if (entry.getValue() == null) {
nullQualifierNames.add(entry.getKey());
}
}
List batchKey = Arrays.asList(new Object[] {
nullQualifierNames
});
DeleteBatchQuery batch = (DeleteBatchQuery) batches.get(batchKey);
if (batch == null) {
batch = new DeleteBatchQuery(dbEntity, qualifierBuilder
.getAttributes(), nullQualifierNames, 27);
batch.setUsingOptimisticLocking(qualifierBuilder
.isUsingOptimisticLocking());
batches.put(batchKey, batch);
}
batch.add(qualifierSnapshot);
}
}
queries.addAll(batches.values());
}
}
}